Cholera Toxins. Produced by Vibrio cholerae, cholera toxin (CT) is a multimeric enterotoxin that transfers ADP-ribose to a G protein, locking adenylate cyclase in an 'on' position.
echinoderm. n. 1. (Animals) any of the marine invertebrate animals constituting the phylum Echinodermata, characterized by tube feet, a calcite body-covering (test), and a five-part symmetrical body. The group includes the starfish, sea urchins, and sea cucumbers.ny of various invertebrate sea animals having a hard spiny outer covering, an internal skeleton, and a radially symmetrical body. Starfish, sea urchins, and sea cucumbers are echinoderms.
Echinoderm spawning events often set off feeding frenzies in the fish and coral communities. After spawning, a few species of echinoderms will care for their fertilized eggs, most commonly the cold water starfishes. Asexual Reproduction. The most common form of asexual reproduction in echinoderms is a process known as fragmentation.